Reflectivity estimation from passive seismic data
, by Lin Zhang
One of the key issues of passive seismic data processing is how to convert the transmission
data into the corresponding reflection data. Autocorrelating the data is a simple method
to do so. The effectiveness of this method, however, is serioiusly limited when the unknown
sources are on-white. After identifying the arrival directions of the events, I use Burg's
method to estimate the reflection coefficients directly from the data. This technique
also provides an opportunity to remove some of the band limited effects of the sources.
The algorithm works well on synthetic data, and it gives interesting results when applied
to field data.
Under the acoustic assumption, a two dimensional conversion algorithm is proposed.
Experiments applying this algorithm to synthetic data reveal several obstacles to applying
the method in practice.
STANFORD